Modular fuel cell standby power supplyTechnical Field
The invention relates to the technical field of fuel cells, in particular to a modular fuel cell standby power supply.
Background
At present, a standby power supply is designed on the basis of a lead-acid storage battery, and is characterized in that the design, operation and maintenance of a system are simple and the cost is low, but the power density of the lead-acid battery is low, most of standby power supplies are considered due to site limitation at present, the whole capacity design is low, so that the standby power supply can only be used for operating main equipment such as partial emergency equipment, a control room computer and the like, the operation time is short, and the later-stage supplementary capacity needs charging time as long as several hours.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a modular fuel cell standby power supply which can meet the requirement of large-load equipment operation, is stable and durable in operation and is convenient for capacity supplement in the later period.
The purpose of the invention is realized by the following technical scheme:
a modular fuel cell backup power supply comprising:
a power generation cabinet for generating power by using a fuel cell;
the control cabinet controls the power generation cabinet to work and integrates and outputs the electric energy output by the power generation cabinet to the power distribution cabinet;
the power distribution cabinet inverts the direct current input by the control cabinet into alternating current and assists in balancing loads;
the power generation cabinet comprises a plurality of independent power generation submodules.
The power generation device generates power through the plurality of independent power generation sub-modules, and can be respectively started according to the external load requirements, so that the power consumption requirement of the operation of heavy-load equipment can be met, and the plurality of power generation sub-modules are independent, namely when one power generation sub-module fails, other power generation sub-modules can be switched into, maintenance is carried out under the condition of normal power supply without influence, and the overall power supply stability is high. Meanwhile, the power generation submodule generates power by using a fuel cell, namely, charging is not needed to be performed without consuming time, and only fuel (hydrogen) needs to be supplemented, so that the power generation submodule is convenient and efficient.
Preferably, the power generation cabinet further includes:
the hydrogen supply module is used for supplying hydrogen required by power generation to the power generation sub-module;
and the environment management module is used for adjusting the working modes of the modules of the power generation cabinet and ensuring that the power generation cabinet is quickly started and normally operated in different environments.
Preferably, the power generation submodule includes:
a fuel cell stack unit for generating electricity using hydrogen and air;
the control unit controls each unit of the power generation submodule to normally operate;
a hydrogen pipeline unit for providing hydrogen for the fuel cell stack unit;
and the electric energy unit converts the electric energy output by the fuel cell stack unit into required voltage and outputs the voltage.
Preferably, the fuel cell stack unit includes an MEA assembly, a bipolar plate, an end plate, and a catalyst.
Preferably, the control unit includes a fuel cell control board, a fan, an activation resistor, a sensor, and an actuator.
Preferably, the hydrogen pipeline unit comprises a valve group, a pipeline, an electromagnetic valve and a circulating pump.
Preferably, the power unit comprises a DC/DC and an output interface.
Preferably, the control cabinet comprises: the system comprises a direct current bus control module, a system power supply module, a BMS module and a starting power supply module.
Preferably, the power distribution cabinet comprises an inverter module, a lithium battery module and an alternating current bus control module.
The invention has the advantages that:
1. a plurality of power generation submodules can be opened as required, and the power consumption requirement of the operation of heavy-load equipment is met.
2. And a plurality of power generation submodules independently operate, so that online maintenance and replacement are facilitated.
3. The fuel cell is adopted to generate electricity, time-consuming charging is not needed, and capacity supplement is convenient.
4. And by adopting the hydrogen fuel cell, the emission is only water and partial heat, so that the environment is protected.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the power generation cabinet;
fig. 3 is a schematic diagram of the structure of the power generation submodule.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A modular fuel cell backup power supply comprising:
a power generation cabinet for generating power by using a fuel cell;
the control cabinet controls the power generation cabinet to work and integrates and outputs the electric energy output by the power generation cabinet to the power distribution cabinet;
the power distribution cabinet inverts the direct current input by the control cabinet into alternating current and assists in balancing loads;
the power generation cabinet comprises 8 independent power generation submodules. The independent structure is a layered structure type, but the independent structure cannot be in parallel connection, and because the number of the power generation sub-modules is large, the direct parallel connection inevitably has the problems of DC/DC current sharing at the rear end of the fuel cell, limited data transmission data on a CAN bus and the like, and the reliability of system control is influenced.
According to the invention, power is generated by 8 independent power generation sub-modules, and each power generation sub-module can be started according to the external load requirement and the internal sub-module optimization management logic, so that on one hand, the power consumption requirement of the operation of a large-load device can be met, and on the other hand, because the 8 power generation sub-modules are independent, when a certain power generation sub-module fails, other power generation sub-modules can be switched into, maintenance is carried out under the condition of normal power supply without influence, and the overall power supply stability is high. Meanwhile, the power generation submodule generates power by using a fuel cell, namely, charging is not needed to be performed without consuming time, and only fuel (hydrogen) needs to be supplemented, so that the power generation submodule is convenient and efficient. It should be further noted that, in this embodiment, the rated output power of each power generation submodule is 5KW, and the maximum output power of the whole standby power supply is 30KW, that is, 6 power generation submodules can be turned on simultaneously, so as to leave an online maintenance space for 2 power generation submodules, and ensure the stability of the power supply of the whole standby power supply.
Specifically, the power generation cabinet still includes:
the hydrogen supply module is used for supplying hydrogen required by power generation to the power generation sub-module; and distributes hydrogen according to the operating conditions of the individual power generation sub-modules.
And the environment management module is used for adjusting the working modes of the modules of the power generation cabinet and ensuring that the power generation cabinet is quickly started and normally operated in different environments.
The power generation sub-module includes:
the fuel cell stack unit comprises an MEA component, a bipolar plate, an end plate and a catalyst, and is mainly used for generating electricity by utilizing hydrogen and air;
the control unit comprises a fuel cell control panel, a fan, an activation resistor, various sensors and various executive devices, and is mainly used for acquiring the galvanic pile and uploading environmental information to the cell control panel by the sensors and controlling the fan and the various executive devices by an internal algorithm to ensure the normal work of the fuel cell;
the hydrogen pipeline unit comprises a valve group, a pipeline, an electromagnetic valve and a circulating pump, and is mainly used for stabilizing the pressure of a hydrogen source to the pressure required by the system, controlling hydrogen to enter the galvanic pile and exhaust through the electromagnetic valve, and providing a hydrogen source for the galvanic pile to generate electricity;
the electric energy unit comprises a DC/DC and various output interfaces, and is mainly used for converting electric energy generated by the fuel cell stack into voltage levels required by a system and supplying power to the system by the power supply DC.
In addition, the control cabinet includes: the direct current bus control module, the system power supply module, the BMS module and the starting power module are mainly used for controlling each module of the power generation cabinet and integrating and outputting electric energy of each module of the power generation cabinet to the power distribution cabinet.
The power distribution cabinet comprises an inverter module, a lithium battery module and an alternating current bus control module, the direct current input by the control cabinet is inverted into alternating current, and meanwhile, the lithium battery plays a role in auxiliary load balancing.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.